Keri Russell (at left and right) and Matthew Rhys (center) in disguise on "The Americans."Craig Blankenhorn/FX (3)

Spy TV shows wouldn’t be half as much fun without their liberal use of disguises to aid the characters in their subterfuge — and “The Americans” is no exception.

The FX drama (which returns for its third season Wednesday at 10 p.m.) has spent the past two seasons giving various identities to series stars Keri Russell and Matthew Rhys, who play undercover Soviet agents Elizabeth and Philip Jennings.

Making their alter-egos even more amusing is the show’s 1980s setting — meaning plenty of bad wigs and oversize eyeglasses. Here’s our pick of the spy spouses’ 10 best disguises so far.

Philip as “Clark”

Craig Blankenhorn/FX

The series’ longest-running disguise is Philip’s alter-ego Clark, who seduces and eventually marries Martha (Alison Wright), an FBI secretary. His bad dirty-blond toupee and omnipresent wire-rimmed glasses prove too much for Martha to resist — she continues to keep their illicit marriage a secret while unwittingly acting as an informant to the enemy.

Season 1, Episode 7

Craig Blankenhorn/FX

With her husband away in New York, Elizabeth dolls herself up as a vixen — in a long, dark brown wig with bangs and red lips to match her low-cut red top — on her way to intimidating a mob-connected bookie to release a defense contractor/spy from his gambling debts.

Season 1, Episode 11

Craig Blankenhorn/FX

After Elizabeth’s mentor General Zhukov is murdered, she tracks downs his assassin, Patterson, wearing a trench coat, heels, a short curly wig and a pair of oversize tortoise-shell eyeglasses. But she’s not as nice as she looks — after beating him up in a bar bathroom, she takes him to a warehouse to tie him up, blindfold him and interrogate him at gunpoint.

Season 1, Episode 13

Elizabeth tries to avoid detection by the FBI.FX

Elizabeth looks boho chic in a wavy blond wig, blue-tinted sunglasses and red-and-brown-plaid coat in the drama’s first season finale. But her cool quickly turns to chaos when a surveillance tape pickup is aborted due to FBI presence and Elizabeth is shot before Philip rescues her in the getaway car.

Season 2, Episode 1

FX

Philip dons a blond wig, tinted glasses and tan corduroy and leather blazer in the second season premiere to impersonate an American meeting with Afghans seeking money and weapons to fight the Soviets — and ends up killing them in a struggle in which his wig falls off, briefly exposing his identity.

Season 2, Episode 3

Elizabeth consoles a friend’s son.Patrick Harbron/FX

After the Jennings’ friends and fellow spies Emmett and Leanne Connors are murdered, Elizabeth goes to visit their orphaned son, Jared (Owen Campbell), disguised as a child-services worker in a brown pixie wig, wide plastic eyeglasses and a frumpy sweater vest.

Season 2, Episode 6

Elizabeth and Philip pose as U.S. government agents.Craig Blankenhorn/FX

The couple impersonates US government agents — Elizabeth in a blond bob, power suit and thick dark frames while Philip channels Clark with his bad comb-over, mustache and aviator-style glasses — to interview and threaten Navy SEAL Andrew Larrick (Lee Tergesen), who is a suspect in Emmett and Leanne’s murders.

Season 2, Episode 7

Philip goes undercover as a janitor.Craig Blankenhorn/FX

Philip wears a long, greasy wig and mustache to pose as a janitor in order to sneak into a computer-sciences lab and plant a bug — an act that leaves a lingering student dead in the garbage can.

Season 2, Episode 9

Philip and Elizabeth go incognito to infiltrate a military base.Patrick Harbron/FX

Both spouses dress up as sanitation workers — Philip in a blond, curly wig and beanie and Elizabeth in a cropped brown wig and camo baseball hat — to infiltrate a military base, but the disguise isn’t enough to keep Philip safe. In the process of getting photos of Contra rebels training at the base, he ends up killing three American soldiers in a bloody massacre.

Season 2, Episode 11

Philip acts the part of a Vietnam vet.Craig Blankenhorn/FX

Philip fakes being a Vietnam War vet — in long hair and a “Duck Dynasty”-worthy beard — when visiting a cancer-stricken former Lockheed employee whom he wants to turn to the Russian cause.